https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/8742143Edit ImageSaveSaveEditCropCustom TextBlue Mass is held at St. Patrick’s Cathedral to honor fallen police during the annual event in Washington, D.C., September 29, 2001.CBP photo by Glenn Fawcett. Original public domain image from FlickrMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseEditorial use only JPEGSmall JPEG 1200 x 774 px | 300 dpiLarge JPEG 3500 x 2259 px | 300 dpiBest Quality JPEG 5405 x 3488 px | 300 dpiFree DownloadBlue Mass is held at St. Patrick’s Cathedral to honor fallen police during the annual event in Washington, D.C., September 29, 2001.More